999 resultados para Âge Moderne


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哺乳动物体内氨基酸及蛋白质的非酶糖化反应(Mailard反应)与糖尿病及其并发症的关系已引起广泛关注[1],β-羧乙基锗倍半氧化物(Ge-132)具有预防糖尿病和调节糖代谢的作用[2],研究Ge-132对Mailard反应的抑制作用对于开发防治糖尿病…

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Ge-132的羧酸阴离子与稀土离子螯合配位,生成3:1型配合物。在配合物中,Ge-132的GeO3/2基因水解为Ge(OH)3,并且不参与稀土配位,系列稀土离子配合物的结构性质基本相同,在50℃,pH值为6的水溶液中,该配合物选择性地催化5’-AMP或5’-dAMP的磷酯键水解断裂,生成相应的核苷和磷酸,而不影响碱基与戌糖之1间的苷键。

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扬子地块西南缘分布着大量富含Cd、Ge与Ga的铅锌矿床,已成为我国Pb、Zn及Cd、Ge与Ga矿产资源的重要生产基地。对代表性铅锌矿床进行野外地质调查和系统采样鉴定后.应用电子探针微区分析手段,研究主要矿石矿物闪锌矿、方铅矿和黄铁矿中分散元素的富集特征。结果显示.各类矿床中闪锌矿均相对富集Cd,方铅矿富集Ge与Ga,而黄铁矿中Cd、Ge与Ga的富集系数均相对较低.未呈现出选择性富集的趋势;赋存于震旦纪一寒武纪地层且以脉状、网脉状产出的矿体中闪锌矿的Cd含量明显高于赋存于晚古生代并以层状产出的矿体中闪锌矿的Cd含量。

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info:eu-repo/semantics/published

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info:eu-repo/semantics/published

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Germanium MOS capacitors have been fabricated with a high-? HfO dielectric using ALD. An in-situ low temperature (250°C) nitrogen plasma treatment on the germanium surface prior to the deposition of HfO was found to be beneficial to the electrical properties of the devices. Germanium MOS capacitors have also been fabricated with a SiO dielectric deposited by an atmospheric pressure CVD 'silox' process. The same low temperature plasma nitridation was found to degrade the electrical properties of the silox devices. The effect of a post-metal anneal in H and N on both types of capacitor structure was also found to degrade device electrical properties. copyright The Electrochemical Society.